Add themes to voice assistant app

Add four themes: "light", "dark", "textured-light", and
"textured-dark" to the voice assistant app. Themes can be
changed by modifying assets/config.json file.

Bug-AGL: SPEC-4906
Signed-off-by: Malik Talha <talhamalik727x@gmail.com>
Change-Id: I3e257da70543c7918e4f0cf96a62907390af8480

1 files changed, 4 insertions, 1 deletions

diff --git a/lib/utils/app_config.dart b/lib/utils/app_config.dart
index 8f5c566..eacb10f 100644
--- a/lib/utils/app_config.dart
+++ b/lib/utils/app_config.dart
@@ -5,8 +5,10 @@ import 'package:flutter/services.dart';
 class AppConfig {
   late String grpcHost;
   late int grpcPort;
+  late String theme;
 
-  AppConfig({required this.grpcHost, required this.grpcPort});
+  AppConfig(
+      {required this.grpcHost, required this.grpcPort, required this.theme});
 
   factory AppConfig.fromAsset() {
     return AppConfig._();
@@ -21,6 +23,7 @@ class AppConfig {
     return AppConfig(
       grpcHost: jsonMap['grpc_host'],
       grpcPort: jsonMap['grpc_port'],
+      theme: jsonMap['theme'],
     );
   }
 }